Calculator.



Patented Apr.` 22,- |902; G. ROEGNER.

C A L C U L A T 0 R (Application filed Aug. 8, 1901.)

2 Sheets-Shawl l.

(No Model.)

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Patented Apr. 22, 1902.

s. noEGNEn.

CALGU LATOR.

(Application filed Aug. S, 1901.)

2 Sheets-Sheet 2.

(No Model.)

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NTTsn STATES PATENT Turcs'.

GEORGE ROEGNER, OF PASSAIC, NEV JERSEY, ASSIGNOR TO THE CARLTON MANUFACTURING COMPANY, OF CARLTON HILL, NEW JERSEY, A COR- PORATION OF NEV JERSEY.

CALCU LATO R.

SPECIFICATION forming part of Letters Patent No. 698,141, dated April 22, 1902. Application filed August 8, 1901. Serial No. 71,297. (No model.)

.To @ZZ whom t may concern: of the casing at about the mid-height, and im- 5o Be itknown thatLGEORGE ROEGNER, acitimediately above the slot is secured a slip A6, zen of the United States, residing in Passaic, bearing a series of figures representing one in the county of Passaic and State of New seriesof elements of the computations-in this 5 Jersey, have invented a certain new and useinstance the rates of Wages per 'hour based on ful Improvement in Calculators, of which the certain rates per weekand A7 is a strip of 55 following is a specification. transparent celluloid or other material serv- The invention relates to instruments for ing to protect the slip, while permitting the indicating the results of various computafigures to be plainly seen. xo tions--as, for instance, the amount to be paid B is a shaft extending through the casing for a period of service, the rate per hour and on the axial line, supported in bearings to be 6o the number of hours in the term of service presently described and having on one or being known-and belongs to that class in both overhung ends a small hand-wheel B, which the figures representing the results are by which the shaft may be rotated in either 15 arranged on a revoluble cylinder and viewed direction. Upon the shaft is mounted a cythrough suitable openings in the inclosing lindrical drum B2, bearing on its outer face 65 casing. a series of equallyspaced circumferential The object of the invention is to render ridges B3, the grooves or spaces between cointhe reading of the instrument more certain cidingwiththepositionsoftheseriesofiigures 2o and reduce the liability of error; and it conon the slip A6 and each carryingastrip B4,upon

sists in certain novel features and arrangewhich areiiguresrepresentingthe amount due 7o ments of parts, to be hereinafter described. for services `at the rates shown upon the slip The accompanying drawings form a part A6 and for terms corresponding to the numof this speciiication and show whatI consider bers 'of hours indicated by the numerals on 25 the best manner of carrying out the inventhe strip B5 at one end of the drum (the left tion. in Fig. 5) and forming the second element of 75 Figure l is a side view of the instrument. the computations. The several strips are so f Fig. 2 is an elevation of one end, and Fig. 3 arranged on the drum that the iigures thereis a similaiview of the opposite end. Fig. 4 on following each number on the strip B5 lie 3o is a transverse vertical section taken on the in a straight line parallel with the axis of the line l 4 in Fig. l; and Fig. 5 is a vertical londrum and indicate the amounts resulting 8o gitudinal section, partly in elevation, the from a multiplication of the number of hours line of section being indicated by the line 5 5 by the several rates. So far as yet described in Fig. 2. Fig. 6 isavertical section through the results thus arranged would show in a 35 certain portions, taken on the line 6 6 in Fig. 3. continuous line in the slot a immediately be- Fig. 7 is a side view of a portion detached, low the slip A( and when thus presented could 85 and Figs. Sand 9are corresponding end views. be read each by its adjacent rate; but such Fig. l0 is a longitudinal section of a portion reading is liable to error by reason of the eX- on a larger scale, and Fig. 11 is a correspondtreme care required to determine the exact 4o ing transverse section. figures for the rate desired, especially when Similar letters of reference indicate the the operator is fatigued by reason of using 9o same parts in all the gures. theinstrument continuously foralong period.

A is a cylindrical casing, preferably of To avoid mistakes due to thus failing to dissheet metal, having its ends received in cirtinguish the figures, I introduce the cylin- .45 cular recesses formed in the end plates A drical shutter C, inclosing the drum,and with A2 and held strongly in place between them the latter inclosed within the casing A. The 9 5 by the tie-rods A3 and screws A4. Feet A5, shutter is aclosed cylinderhaving a slot c', eX- cast on the end plates, serve to support the tending circumferentially and matching to instrument. A slot a extends longitudinally the numerals on the strip B5, and a series of small slots or openings c, arranged spirally and coinciding each with one of the strips Btl'.

Each of the heads C G2 of the shutter is provided with a tubular boss C3, arranged on the axial line and extending through a corresponding opening in the adjacent end plate of the casing. A hand-wheel C4 on one or both affords convenient means for revolving the shutter. The tubular bosses C3 also inclose the shaft B and serve as bearings therefor.

In operating an instrument provided with this novel feature the shutter is rotated to bring the slot c, corresponding to the required rate, or one element, into coincidence with the slot a, directly below such rate. The drum B is then revolved until the other element (in this case the desired number of hours on the strip B5) appears in the opening formed by the intersection of the slots ci and a.. In this position the required result appears in the slot c, and as no other result is visible there is no liability of error in read ingl it.

In order to hold the slot c at the desired rate While finding a series of results for different numbers of hours at such rat-e, I provide a frictional holding means consisting, preferably, of a spring D, attached to the end plate A2, bearing an inwardly-projecting pin D', extending through a hole in the end plate and adapted to engage in eitherl of a series of slight depressions or recesses c2 in the head C2 of the shutter. The series of recesses is arranged in a circle or arc thereof about the boss C3 and is spaced to correspond with the series of slots c and hold either exposed at the slot a, as will be understood. The engaging end of the pin D is rounded, as are also the depressions or recesses c2, so that the shutter maybe revolved by the application of slight force upon the hand-wheels CL sufficient to overcome the resistance offered; but to allow the shutter to revolve freely when desired I provide a lever D2, pivoted to the end plate A2, carrying a wedge-block D3 and a handle D4, by which the wedge-block may be forced beneath the upturned end of the spring D, and thus withdraw the pin D/ sufficiently to clear the head C2 and permit the shutter to be turned unobstruetedly. I prefer also to provide means for limiting the motion of the shutter in both directions. This is effected in the instrument shown by omitting a portion of an annular flange C5 on the head C of the shutter and inserting a screw AS through the end plate A in the path of the flange and adapted to be struck by the ends of the latter, and thus serve as a stop to prevent further rotation when the last of the series of slots c appears at the slot a at either end of the se- I attach importance to the ridges or lands B3 on the drum, for the reason that they serve to protect the strips in the grooves between them from contact with the interior surface of the shutter, duo to imperfect construction or to accidental change of contour of any of' the parts, which otherwise might allow the strips to rub against the adjacent surface of the shutter and deface or obliterate the iigures. The lands also serve an additionalimportant function in aiding in the proper placing of the strips longitudinally and circumferentially. The longitudinal spacing is obviously determined by the lands, the strips being placed exactly between them. In arranging the strips circumferentially each is provided with a transverse line or mark of", which is placed exactly coincident with a line or series of notches c4 on the lands and extending in exact parallelism with the axis. Then thus placed and secured, the spacing of the figures if properly arranged on the several strips will be exact and the several lilies of results corresponding to the number of hours will register exactly with the slot (t when turned thereto.

Modifications may be made in the Aforms and proportions of the parts within wide limits without departing from the principle of the invention or sacrificing its advantages. In the instrument shown provisions are made for sixteen rates and a corresponding number of results for a series of thirty-nine hours; but by varying the diameters and lengths of the parts a greater or less number of co1nputations may be provided for.

Although I have described the invention as applied to the calculation of wages, it will be understood that it may be adapted to other computations-as, for instance, the amounts of interest due on various principals for various periods of time, the selling-prices of commodities at various prices and various weights or volumes, or in determining the commissions due on sales or the amounts due for piecework for a variety of articles at various prices.

Parts of the invention may be used without the whole. The frictional holding dcvice for the shutter may be varied or omitted, as may also the stop for limiting the movement of the shutter. The instrument will serve successfully with a plane cylindrical drum without the lands or ridges. For the reasons above stated I prefer the construction shown.

The hand-wheels B and C* may be omitted from one end or a wheel at one end may operate the drum and a wheel at the opposite end operate the shutter.

The flange C5, serving with the stop AS, may be on the same head with the recesses ci.

Other means than the lines c3 and clon tho strips and lands may be provided for determining the exact positions, or such guides may be omitted and the figures applied to the drum in any preferred manner.

I claiml. In an instrument of the character set forth, the combination of a fixed casing, a drum revoluble within the same, and a cylindrical shutter revolubly interposed between ICO ICS

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the two and having spirally-arranged slots, and connections from said drum and shutter respectively to the exterior of said casing whereby said drum and shutter may be revolved independently of and relatively to each other in either direction, as set forth.

2. In an instrument of the character described, the combination of a cylindrical drum, a casing having an opening through which portions of said drum maybe exposed, and a cylindrical shutterinclosing said drum and inclosed with the latter in said casing, the said shutter having a series of slots arranged to register but one at a time with said opening and expose the desired portion of the drum and conceal the remainder and an additional practically continuous slot, and means for rotating said drum and shutter within the casing, substantially as described.

3. In an instrument of the character set forth, the combination of a drum, a casing having a continuous longitudinal opening through which a portion of said drum may be exposed, and a shutter mounted to revolve in said casing and over said drum and having openings adapted to register but one at a time with said opening in the casing to expose the coincident portion of the drum and having provision for practically continuous exposure of a circumferential portion of the drum, substantially as described.

4. Iu an instrument of the character set forth, the combination of a cylindrical drum, a casing having an opening through which a portion of said drum may be exposed, a cylindrical shutter inclosing said drum and inclosed with the latter in said casing, means for rotating said drum and shutter independently within said casing,the said shutter having a series of slots adapted to register but one at a time with said opening and expose the desired portion of the drum and conceal the remainder, and an additional practically continuous slot, and means for holding said shutter against rotation when desired, substantially as described.

5. In an instrument of the character set forth, the combination of a cylindrical drum, a casing having an opening through which the desired portion of said drum may be exposed, a cylindrical shutter inclosing said drum and inclosed With the latter in said casing, said shutter having a series of slots adapted to register but one at a time with said opening and expose the desired portion of the drum and an additional practically continuous slot for exposing another portion of the drum, means for rotating said drum and shutter independently, means for holding said shutter against rotation when desired, and means for limiting such rotation in either direction, as set forth.

6. In an instrument of the character set forth,acasinghavingalongitudinally-extending opening and a cylindrical drum, in combination with a cylindrical shutter inclosing said drum and inclosed with the latter in said casing, the said shutter having a slot matching to a circumferentialportion of said drum and a series of spirally-arranged slots but one slot coinciding with the longitudinal opening at a time and each matching to the desired portion of the drum, the said slots adapted to register with said opening and allow an element of computation on said drum and the result of the desired computation to be read adjacent to the element of computation on said casing, all substantially as herein specified.

7. In an instrument of the character set forth, a casing, a drum inclosed therein, a series of circumferential ridges on said drum, and a series of relatively independent figurebearing strips secured in the grooves between said ridges and protected by the latter, marks on said ridges and corresponding marks on said strips to aid in properly locating said strips on said drum, and means for rotating said drum Wit-hin said casing and exposing said figures to sight in an openingtherein, all combined substantially as herein specified.

8. The casing A having the opening a and end plates Al A2, shutter C having heads C' C2 thereon and tubular extensions G3 passing through said end plates, and the circumferential slots 'c/ and spirally-arranged slots c', the shaft B passing through said extensions, the drum B2 on said shaft and inclosed in said shutter, and means for rotating the latter and said drum, all combined substantially as herein specified.

9. The combination of casing A having the opening ct and end plates A A2, shutter C and its heads C C2 inclosed in said casing, said shutter having the circumferential slot c' and slots c, the latter being spirally arranged so that only one of the same will be` exposed at a time through the casing-opening, the others being masked by said casing, drum B2 inclosed Within said shutter, and means for rotating said drum and shutter independently, one of said shutter-heads having a series of recesses,and means on the adjacent end plate to engage frictionally with said recesses, substantially as specified.

10. The casing A having the opening d and end plates A A2, shutter O'having the circumferential slot c' and spirally arranged slots c and heads C C2 inclosed in said casing, drum B2 inclosed in said shutter, and means for rotating said drum and shutter independently,`in combination with a series of recesses c2 in one of said heads, a spring D on the adjacent end plate carrying a pin D extending through said end plate and adapted to engage frictionally with said recesses, and means as the lever D2 and wedge-block D3 thereon for withdrawing said pin when desired, all substantially as herein specified.

ll. The casing A having the opening d and end plates Av A2, shutter O having the circumferential slot c and spirally-arranged slots c and heads C G2 inclosed in said casing, drum B2 inclosed in said shutter, and

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moans for rotating said drum and shutter inabove sot forth I ax my signature in presdependently, in combination with a Hangs G5 -enco of two witnesses. on one of said heads, and a, stop Asset in the adjacent end plato and sel-ving with said 5 flange to limit the movement of said shutter, Witnesses:

al1 substantially as herein specified. CHARLES R. SEARLE,

In testimony that I claim the invention JOHN G. N. BELL.

GEORGE ROEGNER. 

